Andre Engels wrote:
The more preferable method is to leave the class alone, and call
getbalance by hand:
data = float('100.00')
a = Account(data)
p = a.getbalance()
print 'balance = ', p
remove_data = float('50.00')
a.withdraw(remove_data)
w = a.getbalance()
print "withdraw = ", w
add_data = float('50.00')
a.deposit(add_data)
add = a.getbalance()
print "deposit = ", add
Some other things:
1. data = float('100.00') is unnecessarily clumsy - you can specify
floats directly without creating a string first by doing data = 100.0
2. You are creating a lot of variables only to use them for the one
and only time on the next line. That's not necessarily bad, it
sometimes improves readability especially if a lot is being done
(which can then be split up in more readable parts), but doing it this
much mostly causes your coding to look more complicated than it
actually is. I would either prefer something like this:
data = 100.0
remove_data = 50.0
add_data = 50.0 # first all input-like elements, so I know
where to go when I want to change something trivial
a = Account(data)
print 'balance = ',a.getbalance()
a.withdraw(remove_data)
print 'balance after withdraw = ',a.getbalance()
a.deposit(add_data)
print 'balance after deposit = ',a.getbalance()
doing away with p, w and add, or the even shorter variant where data,
remove_data and add_data are also removed:
a = Account(100.0)
print 'balance = ',a.getbalance()
a.withdraw(50.0)
print 'balance after withdraw = ',a.getbalance()
a.deposit(50.0)
print 'balance after deposit = ',a.getbalance()
Ok almost there, here is what i have now;
http://linuxcrazy.pastebin.com/m6b090d2d
My problem now is the balance is updated from the file that is pickled
fine, but the first entry goes is not added to that total. I know it is
in this part;
start_total()
start = 0
a = Account(start)
but when I change it to;
start_total()
start = start_total()
a = Account(start)
here is the error;
Enter Amount: 100
Traceback (most recent call last):
File "./py_pettycash.py", line 77, in <module>
menu()
File "./py_pettycash.py", line 53, in menu
a.deposit(cash)
File "./py_pettycash.py", line 15, in deposit
self.balance = self.balance + amt
TypeError: unsupported operand type(s) for +: 'NoneType' and 'Decimal'
-david
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